What Happens If You Overfill Coolant Reservoir
What Happens If You Overfill Coolant Reservoir . You need to check if your coolant reservoir is overflowing. This is where the coolant should be. 2019 Mazda 3 possible coolant leak? Please advise mazda3 from www.reddit.com If that happens, the excess will have to be removed from the system. You risk an explosion of the expansion tank. The engine will also fail if the coolant is overfilled, but the exact amount varies from engine to engine.